your ped will probably refer you to an ear, nose, throat specialist...my son was about 19 months old, suffered from chronic ear infections and enlarged tonsils and adenoids. the tonsils and adeonids were removed and he had tubes put in his ears. when it comes to difficulty breathing at night, there is not much you can do but observe until she has a sleep test done as well as an ent checkup...best of luck. let me know what was found